My TP2 just went caput - Touch Pro2, Tilt 2 Windows Mobile General

I'm sitting on my bed, and i decide to load a video on you tube. The video gets to 49 percent and suddently, blackout. Now I'm sitting here with a brick and no clue what just happened. The phone won't power back on. I have no clue as to what just happened.
Edit: I connected it to the usb and it worked for a few seconds, now it doesn't. I'm guessing their is no usb charging of the device. I'm going to connect it to the wall charger and see what happens. The toolbar battery indicator i installed said it was at 100 the whole time. I've to retrace my steps and see what happened.
I installed total commander, did the default opera reg change, tool bar and task bar icons, nuePowerDriverCDMADiamond-100-v1.0-cab, and sdkcerts

yanked the battery out yet?

Maybe its flat. Ive recently had issues charging and using the supplied headset. I was really worried because my other Dopod 838Pro's connecter is rat sh*t.
But I got a bit of Isopropyl Alcohol and cleaned it with a cotton tip thing. All good now!!

Things seem ok now
Im using the wall charger and it seems to be charging now. I really have to pay attention to the charging light. I also made sure the do not charge if on and connected to the pc option was not checked. I uninstalled nuepower. That was scary. I mean i pulled out the battery and all that and it still didn't come on. For now i'm pretty sure this was a case of a dead battery.

Get that power driver out of there.
I played with a few and they don't work right on this hardware; they will show 100% charge but in fact there is no charge that goes into the battery when on USB. If you don't have the original battery.dll you will need to do a hard reset to get it back.
The unit will charge when OFF (truly off) since it is not actually running at that point, and the DLLs and such are not active.

Related

Plug into sync/cradle/power gives black screen red light

Hi there, my wife and I liked the SX66 I got on Ebay a while ago so much that we decided to get her one too.
When it first arrived it wasn't working so I plugged it into my usb wall charger sync cable to charge it. I first noticed that the sync connection was a bit loose, and when plugged into the sync cable/wall charger the "Red" light (not Amber) came on. I left it on there overnight thinking the battery must have been fully drained or something. By morning it still wouldn't turn on.
So then I tried putting it into the cradle that came with it and plugged that in. NOW it got the "Amber" charging light.
I again let it charge for a while and it eventually turned on for me. The backup battery was low evidently, but eventually that charged to full as well.
I updated to a WM 6.1 ROM, installed UIs and all that fun stuff. The thing worked fine, but still would not play nice with a sync cable, only the cradle. Putting it on a sync cable would result in it turning off and the "Red" light. Putting it in the cradle would work as normal.
Well, yesterday we had a minor accident and a little bit of water got spilled on it. I did my best to dry it off with tissue and took the battery off and let it dry out. I didn't have a hair dryer handy at work, so I just let it air dry for a number of hours.
I then put the battery back in and turned it on. Everything seems to be working. I then tried to attach it to the sync cable so I could install stuff, forgetting that it never worked before on the sync cable. Once I did that the screen dimmed and got a bunch of lines across it like it was shutting off but was garbled, finally leading to black screen and "Red" light. The garbled screen before going black was different than what would normally happen.
I then tried to plug it into the cradle and the same thing happened. The screen immediately dimmed, garbled, went black, "Red" light. So now the cradle doesn't work either!
If I unplug the device and hit the power button it comes up with the 4 colored screen and displays "None" for the "R" and "G". If I do a hard reset the device boots up fine and seems to run without problems. It can go into bootloader mode still too. But there's no way to sync it! Trying to sync it with a cable or the cradle both now leads to immediately shutting down with no access.
Did the water somehow fry the sync connection since the sync connection already seemed flaky? Is there anything I can do to fix that?
Without being able to plug anything into the sync slot, how am I supposed to sync with my computer? Can I do it over a wifi or bluetooth connection? Or maybe beaming stuff from my other Blue Angel? What about installing a different ROM? Without being able to use the sync slot how can you update the ROM?
I only payed $70 for this thing, but money is money so hopefully there's something I can do that won't cost too much.

Broken USB/charging port?

I'm not sure if this is the right place to ask this, please excuse my ignorant.
I have an EVO that won't charge. I've read a lot from Google search results that this is a common problem among many users. However, the port seems to be working, because my computer will recognize the phone and storage when I plug it in. The charge led will come on, and the indicator on the phone will say that it's charging, but the phone is actually only discharging while plugged in. Eventually the led will turn itself off, and the phone stops telling me that it's charging when the battery is down to its last drop.
I hope that someone with similar problem can help me with fixing this, or if anyone cause tell me if it's possible to fix? I want to send it in to HTC since I think the phone is under warranty, even if I don't have the protection plan from Sprint? The problem is the touch glass is cracks, and I don't know if they'll fix the USB port without saying that I broke it and won't cover that under the warranty. I want to buy a new screen and replace the broken one, but if I open up the phone it would void the warranty as well...
So I'm stuck with a discharging phone, cracked screen, and having to carry around 3 separate batteries everyday, and I have no idea what step I need to take.
Please help?
Have you tried plugging it into another charger? It may just be the charger that is screwed up. If this behavior pattern is consistent across multiple chargers then you may want to talk to Sprint to see what options you have.
Concordium said:
Have you tried plugging it into another charger? It may just be the charger that is screwed up. If this behavior pattern is consistent across multiple chargers then you may want to talk to Sprint to see what options you have.
Click to expand...
Click to collapse
Doubt it's the charger as it was stated that the computer connection works - should get a bit of a charge from that. I agree that a Sprint visit is due.
Just went through this myself! Would plug my phone in before bed and wake up with the phone at 2% or so. Thought it was the battery- so i took my battery to have the sprint store check it, they did say it was bad. So i bought 2 batteries off ebay.
I got the batteries and still had the issue. So then I took my phone to the sprint store and had them check the micro-usb port. They said it was fine and they cleaned it out cause dirt/dust was in it. Still had the problem..
So I bought a new micro-usb cable of monoprice (still using the same wall charger) , and that solved the issue! Had a bad cable. Now my phone charges super quickly in matter of 4hrs.
It could still be the charger. The USB cable sends data and power through different pins. So a bad cable could still transfer data while not pushing a charge.
Sent from my PC36100
It's gotta be the port happen to mine and I was able to get it fix as long as the port was still attached to the motherboard, if its not attached then have to go thru the insurance.
EVO with Identity Crisis
I was able to connect to my computer and send data just fine with the old (broken) usb cable.
I've tried three different cable and a car charger, same result; they all say the phone is charging but it only gets discharged. USB/storage connection works. Last time the Sprint store said the battery is faulty, but I have 3 different ones and neither will get charged with the phone plugged in, an external charger will work.
kzn said:
I've tried three different cable and a car charger, same result; they all say the phone is charging but it only gets discharged. USB/storage connection works. Last time the Sprint store said the battery is faulty, but I have 3 different ones and neither will get charged with the phone plugged in, an external charger will work.
Click to expand...
Click to collapse
Definitely sounds like a port issue then. If you return to Sprint and review what you've done, as well as the result of your previous trip, then they should be able to take care of you. If they try to tell you it's the battery again just stand your ground. Good luck.
I had a similar issue. I tried everything. It wasn't until I found my HTC cable that it started charging again. I work in IT and tried cables from everything I could get my hands on (blackberries, external drives etc. ) The cable that came with my phone was the only thing that worked.
Sent from my PC36100 using XDA App
Had same issue except couldnt sync. Eventually couldnt charge at all...Had port replaced ans can charge all day but no sync still....sucks but at least I can charge.
mexigga said:
Had same issue except couldnt sync. Eventually couldnt charge at all...Had port replaced ans can charge all day but no sync still....sucks but at least I can charge.
Click to expand...
Click to collapse
If you replaced the port yourself, I would love to know how to do it!
Took the phone back to Sprint and they said there's nothing they can do. I don't have the protection plan so I couldn't even pay the $100 to get it replaced (although I probably wouldn't as I can upgrade my contract and get a new phone soon). They also told me that HTC wouldn't cover it under their warranty because the screen is cracked and they will blame that on me for misused. I tried to check the warranty policy on HTC, but the page is not even available. Does anyone have experience dealing with HTC? I bought a replacement screen, I'd like to replace the screen but don't want to open up the phone if there's a chance HTC will fix the USB port...
HTC EVO 4G Won't - Stopped Charging Battery Issue
Hey Guys,
Two nights ago I woke up to an EVO that was plugged in with a Cellet
extractable charging cord, as it is just about every night. But, the phone was
still showing that it was charging the battery, animation with lighting bolt,
at only 50% charged after about 6.5 hours of charging. Hmmm....
The latter after trying to charge in the coffee shop first with Cellet chord in the
wall then a portable 3500mah solar portable charger; the phone not seeming to
charge at or past 50% charged.
My EVO is rooted but still with the stock ROM and the gingerbread 2.3.3 OTA
update. The battery is a Seido 1750mah and SetCPU is at 245 - 998mhz. The
phone has only been rooted for a few weeks, but I don't see where rooting
would interfere with battery charging.
I've pulled the battery out, several times to no avail. Switched back to the
stock battery, same results. However, if the battery is less than 50% full
the phone will charge the battery to 25% or 50%, weird. If the battery is
at 75% or more full, the phone will top off the charge to a green LED at 100%,
sometimes. Sometimes it won't fully charge the battery. Weird.
I read different posts regarding poor USB chords so I pulled out the stock
micro USB to USB, a charge only chord I figured, and am trying to top
off the Seido battery, which it seems to be doing as it's now full green but
still charging as the animation shows the bolt in the battery and the LED
is still orange.
If put the batteries in the Seido wall charger, the thing the size of a deck
of cards, both batteries fully charge.
I also use Screen Off by Iwashi Soft. That app has worked pretty well with just
a little funkiness now and then. However, while plugged in, I hit the power
button, instead of the home button to turn on the home screen. The phone
wouldn't open to any screen nor would turn on or off. So I ended up
yanking the battery to turn it off then reinstalled battery and turned phone back
on. I don't know if that had any effect on the charging issue, but I took
the icon off the homescreen and am using the power button only, for now.
I don't think both batteries are faulty at the same time at this point. I
don't know if the screen off app caused some wake issue that interferes with
charging the battery.
I do know that when plugging in the phone to charge there's a bit of clunkiness
initially as the phone locks for a second before allowing use for screen or app
and that's always been the case since the gb update. Also, the LED doesn't
always turn green from amber when fully charged with the screen off until
you reboot or use the phone in some way while still plugged in. So there is
some kind of wake issue in the stock ROM. But the latter has never stopped
the battery from charging.
I do know that Plume, the twitter app, started acting clunky with not updating
in the background unless I opened the app at least once after a reboot. But
I don't know if the latter is a wake issue.
Battery still seems normal. Heavy normal use, lots of SMS, tweets, Pulse reading,
Dolphin browsing, I'll kill 50% or more of the battery in 4+ hours. Otherwise, the
phone mostly in standby with periodic email and twitter reads, the battery lasts
all day or more than 24 hours. But the latter rarely happens anymore because I'm
a user.
The battery just went full charge with the stock charging cable just now.
This morning, I woke up with a dead phone, auto shutoff even though it was
plugged in which I did after solitaire and before going to sleep; as a charging
test.
I don't know if it's the phone or the Cellet retractable cord or both that's
stopping the battery from fully charging normally and consistently. I'll need
to get another data-charge combo chord and do more testing; and a new ROM.
Any ideas anybody?
try a new rom and also try using the stock charger and usb cable. Check inside your usb port on your phone for dust as well. Also go into recovery and wipe your battery stats. In the wipe menu for amonRa and under advanced (maybe here, i dont use cwm on my phone) in clockworkmod. also wipe your dalvik-cache just to clear any issues you may have, restart and give it a test. good luck
I just bought a phone with a broken charger port. Broke clean off the board, so my next step is to try to get liquid solder and stick it to the board. Did you take ur phone apart to see if the port is lose?
So I used the stock USB charging chord. Sure enough, it charged the phone.
Then I tried the portable charger at the coffee shop, worked. So the Cellet retractable
chord obviously had a short or something damaged/shorted for the charging part of
the cable after a year + of use and abuse.
What I don't understand, and haven't researched, is why there are charge only
chords; the stock USB HTC chord charges the phone, but the PC won't recognize
the phone's Micro SD card or the phone as an external drive. I presume the duo use
chords have a data path as well as a charging path. And yes, I know to switch the
phone from charge only to disk drive. The Cellet chord would provide the PC with
recognition for the phone's drive.
Considering the latter, what I'm not sure of, and haven't researched, is why when
the phone stopped charging, the chord eventually stopped charging, the phone
status still showed it as charging; the amber LED light on and the battery icon
in charging animation with white bolt showing? I presume that the charging path
still triggered the charging status, except once when I turned the screen back
on the battery icon was not animated and the white bolt not showing so I unplugged
the chord then plugged it back in where the battery icon animation continued.
Fortunately, or not, this forum returned 600+ results for 'battery not charging' and after
sifting through a few, the charging chord was mentioned which prevented a Sprint trip
and me contacting Seido; thankfully.
So I think manufacturers and ROM/kernel developers should visit this issue as a chord
that actually is not charging, or charging at an absurdly low rate, should trigger some alert
and not show a battery icon animation that appears to be charging normally.

[Q] Galaxy Nexus charging issues...

A while back, after sweating profusely into my phone during a workout session, my gnex started behaving badly when I wanted to charge it. Needless to say I've got a battery app installed that is able to detect the plugin state (whether the phone is on battery, whether the charger is plugged in or whether it's just a usb connection such as a computer) and actual % voltage the thing has in the status bar. The app itself is: Battery by MacroPinch.
Well I figured the usb port was probably going so I got a new one of those (i.e. flex cable microusb etc.) for my sch-i515. I also decided to get a new battery just in case... so I replaced the battery (it's an oem samsung one) and fwiw, the thing stabilized its behavior! I've since swapped them back and forth with no apparent issues. However, I took my phone out with me on a run and it started acting flakey again. I've (in the past) had to clean out the port with a toothpick, I've had to on occasion bend the flap in there, do battery pulls (which believe it or not worked for a while), and so on. This time however was different. The phone wouldn't wake when I plugged in or unplugged the charger... and in no way shape or form would the charge indicator come on (you know, lightning bolt in the batter icon etc.) and to make matters even worse this time, my laptop simply didn't recognize the phone was plugged in. So I bit the bullet and and did the surgery and replaced the usb board and mic.
It could not have gone more smoothly, unfortunately (as might have guessed) all is not well... so now:
if the screen is dark -
the phone will wake when the charger is plugged in
the phone will wake when the charger gets unplugged
Using a moto droid cable (from my og droid)
the phone/computer realize they are plugged in together and Wug's NRT works and so on.
BUT the battery STILL won't charge.
I guess the phone is a couple of years old and it doesn't really owe me anything (I guess) but I'd really like this thing working better until I can get a new one. Does anybody out there have any ideas on what I might have missed? The phone works as before, exactly fine except it won't chare so I'm pretty sure I managed to get all the connectors back together properly... I suppose the usb port I replaced the original with might be defective but....
Any help is greatly appreciated...
Oh I'm rooted but stock, android 4.2.2
No advice at all??
I WOULD have said bad usb port, MAYBE try another? They are cheap enough, mine has been broken forever and I do not want to take device apart to change it because crack in my screen I'm worried will get worse if I take device apart.
so since its impossible for me to charge battery in device, I'm NOT worried about THAT tho, BECAUSE a LONG while back I had purchased 2 extra OEM batteries, PLUS a OEM samsung EXTERNAL CHARGER/stand which ALSO came with a battery. so I NOW have 4 total batteries, and I charge them up in the external charger, then just swap them out as needed.
which honestly is GREAT, cuz if I'm going out all day, I can just bring my extra fully charged batteries with me, and not have to worry about battery drain from heavy use cuz I have 3 other fully charged ones WITH me.
that's really all I can say, if you would like help finding the exact external charger that comes with a battery as well let me know, I had bought mine on amazon couple YEARS ago for only like 25-30$ BRAND NEW, I'm guessing TODAY that price would be like ten bucks
Thanks... that may be the way to go but I use this thing for my gps... but the thing doesnt get power when plugged in at all it seems (I plug it in, pull the battery and it does not stay on) so far I've been using my wife's gnex to charge my main and spare... but like I said the thing is, the phone doesn't even stay on when plugged in and I pull the battery (hers does so I'm thinking that there may be something deeper in that's failed here). I cracked the thing back open last weekend to make sure all the connectors were engaged, but I did not find any issues with them past that point.
Does anyone know if there is a hidden connecter somewhere in there that i could possibly have accidentally unhooked that prevents input power from reaching the guts of this thing?
OK it's getting crazier all the time...
Since my gnex was "working" except for charging (also, the phone would not stay powered on with the usb plugged in and the battery removed) I decided to go for a long run yesterday... I take the phone with me for music, tracking and general "safety". About half-way through my run, I look at the window in the neoprene armband I'm using and it looks like a sauna... the bluetooth cuts out on me... so I pull the phone out and with a minimum of fiddling I get the music back on... regarding the charging issue ... I was using my wife's gnex to charge my two oem batteries.
Well after this run, I try and use voice to text in a text message after I got home... well guess what... the phone records NOTHING. It's like I'm not talking. So I try a few phone calls... the display shows the call in progress, but I hear nothing! So I use my land-line to call the phone... NOTHING NOTHING NOTHING.
I had previously replaced the usb port, so I took out the tools and disassembled the phone. there was some moisture in there... anyway I dry it out as best I can and reassemble. Now I plug in the headphones, and guess what... I make calls... i.e. the damn phone works as a phone. I pull the jack out and nothing. I turn on speaker mode ... I can hear the phone ringing when I place a call... turn off speaker nothing. Bluetooth works with the phone fine, and the volume control for multimedia makes no sound when I toggle it...
Fast forward to today. I disassemble it again thinking I might have not reconnected one of the straps... I disconnect the volume rocker connector and the usb port connecter plus I remove and re install the antenna housing.
NOW the phone CHARGES but no lightning bolt indicator in the battery... but the battery level is CLEARLY increasing! Also when I plug into a laptop, the usb debugging symbol comes on (since I have it enabled) but when I unplug it does NOT go away... I unplug, disable usb debugging it goes away... reenable usb debugging and the symbol comes back without the phone plugged in until reboot.... but now the phone WORKS again as a phone!
so now the phone:
charges but without any visual indication (other than the % reporting of the battery widget I use)
phone recognized by my laptop (which wasnt' working either until I reset some of the connectors today), but unplugging doesn't make usb debugging indicator in status bar go away.
Phone speaker and mic now working without having to use bluetooth, plug-in headphones or speaker phone. (mic was not working with speakerphone turned)
This is just too messed up. My sweat does carry a lot of salt.... and Im wondering if I managed to shake something loose... I did also pry the usb tab up a bit as well...
Is there some way... some fluid I can dunk the phone into, which might clean the thing without destroying it?
My galaxy nexus after some drops not charging.
It can only work only when i have connected with my laptop, charger.
I think usb port is ok.
I must buy a charging port to make that work?

SM-T320 Issues, not charging at all

Okay, so I installed CM13 sometime in April I believe. It was working fine for the most part, battery life wasn't any worse than stock, and I couldn't do OTA updates and had an early nightly build on it.
A couple weeks ago, after my kids let the battery deplete all the way (again), I plugged it in overnight. I should add that when the device was being used while charging, it would get VERY warm at the USB port. The next morning, when I turned it on, it flashed the Samsung boot logo, flickered a bit and shut off. I tried going into recovery, looked through these wonderful forums and even re-seated the battery. It would showed the large empty battery symbol once, sometimes boot the Samsung logo again but always flicker and shut off in about 1-2 seconds. This happened about 3-5 times. Now it doesn't do anything at all.
Before I drop any funds on a battery (I'm on a very tight budget) should I try anything else? Should I be thinking of changing the USB port instead?
try another 5v 2+A charger and micro usb cable
nickweed said:
Okay, so I installed CM13 sometime in April I believe. It was working fine for the most part, battery life wasn't any worse than stock, and I couldn't do OTA updates and had an early nightly build on it.
A couple weeks ago, after my kids let the battery deplete all the way (again), I plugged it in overnight. I should add that when the device was being used while charging, it would get VERY warm at the USB port. The next morning, when I turned it on, it flashed the Samsung boot logo, flickered a bit and shut off. I tried going into recovery, looked through these wonderful forums and even re-seated the battery. It would showed the large empty battery symbol once, sometimes boot the Samsung logo again but always flicker and shut off in about 1-2 seconds. This happened about 3-5 times. Now it doesn't do anything at all.
Before I drop any funds on a battery (I'm on a very tight budget) should I try anything else? Should I be thinking of changing the USB port instead?
Click to expand...
Click to collapse
I know that once my battery is completely depleted, I had to re-seat the battery connection cable, then I plugged the tablet into my PC for about an hour and got that same battery symbol with a circle indicator. After the hour passed, I plugged it into a standard Samsung charger and let it charge from the adapter fully. This has happened to me a few times and the above method has always worked for me! Good Luck!
predator1584 said:
I know that once my battery is completely depleted, I had to re-seat the battery connection cable, then I plugged the tablet into my PC for about an hour and got that same battery symbol with a circle indicator. After the hour passed, I plugged it into a standard Samsung charger and let it charge from the adapter fully. This has happened to me a few times and the above method has always worked for me! Good Luck!
Click to expand...
Click to collapse
I'll give it a shot, thanks! At the very least, I know the USB port is doing something since it gave me a quick battery/circle indicator after I plugged it in to a plug charger this time!
predator1584 said:
I know that once my battery is completely depleted, I had to re-seat the battery connection cable, then I plugged the tablet into my PC for about an hour and got that same battery symbol with a circle indicator. After the hour passed, I plugged it into a standard Samsung charger and let it charge from the adapter fully. This has happened to me a few times and the above method has always worked for me! Good Luck!
Click to expand...
Click to collapse
Well, it took about 15 hours of being plugged in to fully charge, after bring plugged in for a full day just to get it to power up at all!
So now that I can turn it on and stuff, it's getting VERY warm to the touch. I do remember it getting warm before, but never this warm. Right now it's not in it's case, which might have hidden the heat before.
It's mostly on the left side of the device where the heat is most intense, right about at the middle of the device. Is this a signal of the battery needing to be replaced?
And thanks! :good:
nickweed said:
Well, it took about 15 hours of being plugged in to fully charge, after bring plugged in for a full day just to get it to power up at all!
So now that I can turn it on and stuff, it's getting VERY warm to the touch. I do remember it getting warm before, but never this warm. Right now it's not in it's case, which might have hidden the heat before.
It's mostly on the left side of the device where the heat is most intense, right about at the middle of the device. Is this a signal of the battery needing to be replaced?
And thanks! :good:
Click to expand...
Click to collapse
Glad to hear you got the device to come back to life, but in regards to the battery... I've always noticed the heated area in the center left side of the device when multi-tasking. Personally, I flashed a CyanogenMod Rom and have seen less heating issues than when I used the standard TouchWiz Roms. I'm really trying to prevent my tablet getting to the point of a battery replacement, but the Rom seemed to make a difference for me.
The cpu/soc is in the bottom middle (when device is held landscape mode), it will get warm / hot depending on what tasks the tablet is doing, under idle conditions it should not be hot, turn screen brightness down too, when charging it should get warm near the usb port and maybe slightly warm on the back but not hot.

HELP! Can't charge Galaxy Tab S 10.5

I've been having all kinds of trouble getting my tablet to charge. It's acting really weird. Over the last couple of days, I will turn the tablet on and it will say 80% charged (after being plugged in all night). Then, with it still plugged in, it will drain down to 15% in about 30 minutes. Why would it drain so fast (if at all?) when it's plugged in? It's also been taking hours for it to charge once it hits that 15% and I don't use it.
At first, I discovered my charging cable was to blame. I'd plug it in, but the tablet wouldn't detect it was connected unless I pulled on the wires just right for them to make contact. Apparently there was a broken wire inside the plug of the cable. So I replaced it with a new cable. Everything seemed to be working good then, and was actually getting proper charges again. Now though, it doesn't seem to want to work.
I was using the tablet yesterday to check my email. It had been plugged in all day and not being used. It said it was at 100%. After about 10 minutes though, the tablet shut off saying "battery low". When I try to turn it back on, I get the battery indicator showing it's at 0%. So I left it plugged in the rest of the day and over night. I just went to turn it on about an hour ago, and it's still sitting at 0%!
I thought maybe the cable was bad again, so I found another charger and tried that. It does the same thing the other cable does.. It stays off until I plug in the cable. Then, as soon as it's in, the tablet "wakes up" and displays the battery indicator. Like, it detects a power source has been plugged in. But no matter what I do, and how long I keep it plugged in, it stays at 0%. I can force the tablet to turn on by holding the power button. It goes through the boot animation prior to loading the screen. Then, in about 5 seconds, it turns itself off again.
I don't think the battery is truly at 0%. If it were, how would it be able to boot up without even a cable plugged in? I really don't know what to do now. I've rooted it, so I can't send it in to Samsung for repair. I don't even think the warranty would still be good at this point anyway. The tablet is at least 3 years old (based on when I joined this site looking for root help). And I think it was 2-3 years older than that before I bought it. Is there anything I can do?
I can't wait anymore. So frustrating to own something that's worked great then all of a sudden decide to no want to even power on anymore. I've spent all day trying to get it to charge with other cables. I've tried chargers, I've tried just straight cables. Plugging into the wall, plugging into the computer, plugging into the USB port in the car. Nothing works. So I hopped over to Amazon to just order a new tablet. I can afford it, not big deal there. But then I saw a ribbon cable used to replace the USB port on the tablet. Maybe the port is bad? Lots of "highly recommended" reviews. I went ahead and ordered one. It was less than $7. If it doesn't work, I still have the money to go forward with buying a new tablet. If it does, money saved! I went ahead and bought the "customers also buy" kit, with a replacement battery (just in case it's not the port), and a set of tools. If the cable is all I need, I'll have a spare battery. If the battery is all I need, I'll have a spare ribbon. If it still doesn't work, I'll go back to my original plan.
Just kinda bummed this is where I have to go now. Why would it suddenly just stop altogether like that? Is it because I keep it plugged in 95% of the time? Should I keep it unplugged till it's drained then charge it and unplug it again right away? I used to have to do that with an old cell phone. This is my first tablet so I dunno. If I end up needing to replace the whole thing, it'd be nice to know from experienced users what the best way to do it is, and what, if anything, I can do to prevent it happening again.
I'd suspect the battery is kaput.
It's not a good idea to keep the battery on permanent charge, there's no need. Let it cycle normally.
Well, all told this was an educating experience. I got the battery first. It came about 40% charged. Once it was installed I used TWRP to create a system backup and downloaded it to my computer. Then I left it plugged in overnight. The next day it was down to 30%. So the "charging" indicator on the screen was just a bunch of lies. I got the replacement charging port a day later and installed it. I didn't do anything else with the tablet, just left it turned off and the charging cable plugged in. It said it was charging, but again, after about 12 hours of charging overnight, the following morning it was down to 18%. So I'm returning both the battery and the port. They may still be working fine, and the problem is elsewhere in the tablet. I accidentally broke the little metal connectors over the power button (it's a contact sensor, and the connectors sit on top and complete the circuit when the button is pressed) when I took the back off to replace the parts. I also cracked my screen, although I think it's just the protector I put on it. I'm not sure what else to try at this point. The tablet is essentially a paperweight now. I can turn it on and watch the battery slowly drain to 0%, but I'll never get any more use out of it. So I decided to do a system wipe prior to putting it away for some future project to try and rescue it. Now it's stuck with the "Teamwin" screen flashing at me. I give up. I looked at Amazon to see if I could just buy another one, but they don't have any "new" left. They're all refurbished or "slightly used" from 3rd parties. I looked at other tablets, and bought a new Samsung Galaxy Tab S5E. It looks like it has the best reviews and marks. The only issue would be the wifi, but it seems to be a hit or miss with people. Some people say it's a problem, others say they don't even have a problem. So.. <shrug> I'll see how it works for me.

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